ketose|ketoses in English

noun

simple sugar which contains a ketone group (Chemistry)

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1. Ketohexose A ketose SUGAR with six carbon atoms , e . g . fructose.

2. The number of open chain stereoisomers for an aldose monosaccharide is larger by one than that of a ketose monosaccharide of the same length.

3. Glucose is an aldose (terminal carbonyl) that Cyclizes into a pyranose, fructose is a ketose (internal carbonyl) that Cyclizes into a furanose

4. Systems for converting aldose sugars to ketose sugars and separating and/or concentrating these sugars using differences in the sugars' abilities to bind to specific affinity ligands are described.

5. In a simple open-chain monosaccharide, every carbon is chiral except the first and the last atoms of the chain, and (in ketoses) the carbon with the keto group.

6. The present invention belongs to the field of organic synthesis, relates to a method for synthesizing a saponin, and in particular, to a method for constructing a glycosidic bond in a saponin, and comprises the following steps: directly reacting an excessive amount of aldose or ketose with aglycone in a suitable organic solvent at 30 °C to a reflux temperature and with the presence of an acid catalyst, to obtain a target product saponin.